:root {
  --fr4: #08110d;
  --fr4-mid: #0e1a14;
  --fr4-lift: #15241c;
  --silk: #e8e2d4;
  --silk-dim: #9a9484;
  --copper: #c47832;
  --copper-hot: #e0a35a;
  --copper-deep: #8a5220;
  --hasl: #c8b48a;
  --mask-line: #1e3328;
  --mask-strong: #2f4a3a;
  --ok: #6cbc78;
  --ok-dim: #2f5a38;
  --danger: #d45a48;
  --ink: var(--silk);
  --muted: var(--silk-dim);
  --bg: var(--fr4);
  --bg2: var(--fr4-mid);
  --bg3: var(--fr4-lift);
  --line: var(--mask-line);
  --line-strong: var(--mask-strong);
  --accent: var(--copper);
  --accent-dim: var(--copper-deep);
  --accent-glow: rgba(196, 120, 50, 0.22);
  --font: "Syne", "Avenir Next", sans-serif;
  --mono: "IBM Plex Mono", "SF Mono", ui-monospace, monospace;
  --radius: 4px;
  --shadow: 0 20px 48px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--font);
  background: var(--fr4);
  color: var(--silk);
  line-height: 1.45;
  position: relative;
  isolation: isolate;
}

/* —— board atmosphere —— */
.board-bg {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background:
    radial-gradient(ellipse 55% 40% at 12% 0%, rgba(196, 120, 50, 0.14), transparent 55%),
    radial-gradient(ellipse 45% 35% at 88% 8%, rgba(43, 179, 163, 0.07), transparent 50%),
    linear-gradient(165deg, #0c1913 0%, var(--fr4) 42%, #050a08 100%);
}
.board-hex {
  position: absolute;
  inset: -20%;
  opacity: 0.28;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='56' height='98' viewBox='0 0 56 98'%3E%3Cpath fill='none' stroke='%23c47832' stroke-opacity='0.35' stroke-width='0.7' d='M28 2 L54 17 L54 47 L28 62 L2 47 L2 17 Z'/%3E%3C/svg%3E");
  background-size: 56px 98px;
  animation: hex-drift 48s linear infinite;
}
.board-bloom {
  position: absolute;
  width: 42vw;
  height: 42vw;
  top: -8%;
  right: -6%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(224, 163, 90, 0.12), transparent 68%);
  animation: bloom-breathe 7s ease-in-out infinite;
}
.board-trace {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, transparent 0%, transparent 48%, rgba(196, 120, 50, 0.06) 50%, transparent 52%, transparent 100%),
    linear-gradient(0deg, transparent 0%, transparent 62%, rgba(200, 180, 138, 0.04) 64%, transparent 66%, transparent 100%);
  background-size: 120px 100%, 100% 90px;
  mix-blend-mode: screen;
  opacity: 0.55;
}

@keyframes hex-drift {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(-56px, -98px, 0); }
}
@keyframes bloom-breathe {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.08); }
}
@keyframes led-pulse {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 0.7; }
}

@media (prefers-reduced-motion: reduce) {
  .board-hex, .board-bloom, .stage-glow {
    animation: none !important;
  }
}

.hint code, .mono {
  font-family: var(--mono);
  font-size: 0.84em;
}

main { padding: 1rem clamp(1.25rem, 4vw, 3rem) 2rem; }

.donor-layout {
  display: grid;
  grid-template-columns: minmax(320px, 1.05fr) minmax(340px, 0.95fr);
  gap: 1.35rem;
  align-items: start;
}
.designer-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 0;
}

.preview-pane,
.block,
.breed-dock {
  background:
    linear-gradient(145deg, rgba(196, 120, 50, 0.06), transparent 40%),
    linear-gradient(180deg, rgba(21, 36, 28, 0.95), rgba(10, 18, 14, 0.98));
  border: 1px solid var(--mask-line);
  border-radius: var(--radius);
  padding: 1rem 1.05rem 1.15rem;
  box-shadow: var(--shadow), inset 0 1px 0 rgba(200, 180, 138, 0.06);
  position: relative;
}
.preview-pane::before,
.block::before,
.breed-dock::before {
  content: "";
  position: absolute;
  top: 6px;
  right: 6px;
  width: 7px;
  height: 7px;
  border-top: 1px solid var(--copper);
  border-right: 1px solid var(--copper);
  opacity: 0.55;
}

.unit-head {
  display: flex;
  justify-content: space-between;
  gap: 0.85rem;
  align-items: baseline;
  margin-bottom: 0.85rem;
}
.unit-head h2 { margin: 0; }
.unit-head .hint { margin: 0; text-align: right; }

.type-block { margin-top: 1rem; }
.type-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(4.7rem, 1fr));
  gap: 0.4rem;
}
.type-btn {
  position: relative;
  background: rgba(5, 10, 8, 0.75);
  color: var(--silk);
  border: 1px solid var(--mask-line);
  border-radius: var(--radius);
  padding: 0.55rem 0.45rem 0.5rem 0.75rem;
  font-weight: 600;
  text-align: left;
  overflow: hidden;
  transition: border-color 0.15s, transform 0.12s, background 0.15s, box-shadow 0.15s;
}
.type-btn::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--type-color, var(--copper));
}
.type-btn:hover {
  border-color: color-mix(in srgb, var(--type-color, var(--copper)) 55%, var(--mask-line));
  transform: translateY(-1px);
}
.type-btn strong { display: block; font-size: 0.72rem; font-weight: 700; letter-spacing: -0.01em; }
.type-btn span {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.56rem;
  color: var(--silk-dim);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-family: var(--mono);
}
.type-btn.active {
  border-color: var(--type-color, var(--copper));
  background: color-mix(in srgb, var(--type-color, var(--copper)) 14%, rgba(5, 10, 8, 0.9));
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--type-color, var(--copper)) 40%, transparent),
    0 0 18px color-mix(in srgb, var(--type-color, var(--copper)) 22%, transparent);
}

.stage-card {
  position: relative;
  background: #030605;
  border: 1px solid var(--mask-line);
  border-radius: var(--radius);
  padding: 0.65rem;
  overflow: hidden;
}
.stage-glow {
  pointer-events: none;
  position: absolute;
  inset: 8% 12%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(196, 120, 50, 0.18), transparent 70%);
  animation: led-pulse 3.2s ease-in-out infinite;
  z-index: 0;
}
#badge-canvas {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  background: transparent;
  border-radius: 2px;
}
#badge-canvas.oled-tap {
  cursor: pointer;
}
#badge-canvas.oled-scanning {
  cursor: progress;
}
.stage-meta {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.7rem 0.15rem 0.1rem;
}
.stage-toggles { margin: 0; }
.caption {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--silk);
  letter-spacing: -0.01em;
}

.secure-banner {
  background: #3a1812;
  color: #f0d0c4;
  border-bottom: 1px solid var(--danger);
  padding: 0.75rem clamp(1.25rem, 4vw, 3rem);
  font-size: 0.88rem;
}
.secure-banner code {
  font-family: var(--mono);
  font-size: 0.85em;
  color: #fff;
}

.breed-sources {
  /* Keep the <video> in-layout and “visible” enough for browsers to decode
     frames (opacity:0 / display:none often yields blank drawImage). */
  position: fixed;
  right: 0;
  bottom: 0;
  width: 160px;
  height: 120px;
  z-index: 0;
  opacity: 0.02;
  pointer-events: none;
  overflow: hidden;
}
.breed-sources video {
  width: 160px;
  height: 120px;
  object-fit: cover;
}
.breed-dock.scanning {
  border-color: var(--ok-dim);
  box-shadow: var(--shadow), 0 0 24px rgba(108, 188, 120, 0.12);
}
.breed-dock #qr-caption:empty { display: none; }
.paste-fallback {
  margin-top: 0.85rem;
  color: var(--silk-dim);
  font-size: 0.85rem;
}
.paste-fallback summary {
  cursor: pointer;
  color: var(--copper-hot);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

#qr-canvas {
  display: block;
  background: #fff;
  image-rendering: pixelated;
}

.gene-controls {
  display: grid;
  gap: 0.7rem;
  margin: 0.85rem 0 1rem;
}
.gene-row.slider {
  display: grid;
  grid-template-columns: 6.5rem 1fr 2.6rem;
  gap: 0.5rem;
  align-items: center;
}
.gene-row.toggle {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.15rem;
}
.gene-row label {
  margin: 0;
  color: var(--silk);
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
}
.gene-row.toggle .gene-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  font-size: 0.82rem;
  color: var(--silk);
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
}
.gene-row .val {
  font-family: var(--mono);
  color: var(--copper-hot);
  text-align: right;
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
}
.gene-row .hint-mini {
  grid-column: 1 / -1;
  margin: -0.15rem 0 0;
  color: var(--silk-dim);
  font-size: 0.68rem;
  line-height: 1.35;
}
.gene-advanced {
  margin: 0.5rem 0 0.35rem;
  font-size: 0.78rem;
  color: var(--silk-dim);
}
.gene-advanced summary {
  cursor: pointer;
  color: var(--silk-dim);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  user-select: none;
}
.gene-advanced summary:hover { color: var(--copper); }
.gene-advanced label { margin-top: 0.65rem; }

.gene-tools {
  display: block;
  margin-bottom: 0.35rem;
}
.actions { margin-top: 0.35rem; }

.presets { margin: 0 0 0.35rem; }
.presets button,
button.ghost {
  background: transparent;
  color: var(--silk);
  border: 1px solid var(--mask-line);
  font-weight: 600;
  padding: 0.42rem 0.75rem;
  border-radius: var(--radius);
}
.presets button:hover,
button.ghost:hover {
  border-color: var(--copper);
  background: var(--accent-glow);
  filter: none;
  color: var(--copper-hot);
}

textarea.mono,
pre.export {
  display: block;
  width: 100%;
  background: rgba(3, 6, 5, 0.85);
  border: 1px solid var(--mask-line);
  color: var(--hasl);
  border-radius: var(--radius);
  padding: 0.65rem 0.75rem;
  font-family: var(--mono);
  font-size: 0.76rem;
}
textarea.mono {
  margin-top: 0.25rem;
  resize: vertical;
  color: var(--silk);
}
pre.export {
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 3.2rem;
  margin: 0.75rem 0 0;
}
pre.export.compact {
  min-height: 0;
  margin-top: 0.85rem;
  opacity: 0.92;
}

h2 {
  margin: 0 0 0.75rem;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--copper);
  font-weight: 700;
  font-family: var(--mono);
}
.hint { margin: 0 0 0.75rem; color: var(--silk-dim); font-size: 0.82rem; }
.hint.tight { margin: 0; font-size: 0.72rem; }

label {
  display: block;
  margin: 0.55rem 0;
  font-size: 0.8rem;
  color: var(--silk-dim);
}
label.check {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0 0.35rem 0 0;
  color: var(--silk-dim);
  font-size: 0.78rem;
}

input[type="text"],
input[type="password"],
select,
textarea {
  display: block;
  width: 100%;
  margin-top: 0.3rem;
  background: rgba(3, 6, 5, 0.9);
  border: 1px solid var(--mask-line);
  color: var(--silk);
  padding: 0.5rem 0.65rem;
  font: inherit;
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input.mono, textarea.mono { font-family: var(--mono); }
input[type="text"]:focus,
input[type="password"]:focus,
select:focus,
textarea:focus {
  border-color: var(--copper);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  margin: 0;
  padding: 0;
  background: transparent;
  border: none;
  height: 1.25rem;
}
input[type="range"]:focus { outline: none; box-shadow: none; }
input[type="range"]::-webkit-slider-runnable-track {
  height: 3px;
  border-radius: 1px;
  background: linear-gradient(90deg, var(--copper-deep), var(--copper-hot));
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 13px;
  height: 13px;
  margin-top: -5px;
  border-radius: 1px;
  background: var(--silk);
  border: 2px solid var(--copper);
  box-shadow: 0 0 0 3px rgba(196, 120, 50, 0.18);
  cursor: pointer;
  transform: rotate(45deg);
}
input[type="range"]::-moz-range-track {
  height: 3px;
  border-radius: 1px;
  background: var(--mask-strong);
}
input[type="range"]::-moz-range-thumb {
  width: 13px;
  height: 13px;
  border-radius: 1px;
  background: var(--silk);
  border: 2px solid var(--copper);
  cursor: pointer;
  transform: rotate(45deg);
}

.row { display: flex; flex-wrap: wrap; align-items: center; }
.gap { gap: 0.45rem; margin: 0.45rem 0; }

button {
  background: linear-gradient(180deg, var(--copper-hot), var(--copper));
  color: #1a1208;
  border: 1px solid var(--copper-deep);
  padding: 0.52rem 0.95rem;
  font: inherit;
  font-weight: 700;
  font-size: 0.8rem;
  cursor: pointer;
  border-radius: var(--radius);
  letter-spacing: 0.02em;
  transition: filter 0.12s, transform 0.12s, box-shadow 0.12s;
  box-shadow: 0 1px 0 rgba(255, 220, 170, 0.25) inset;
}
button:hover {
  filter: brightness(1.08);
  box-shadow: 0 0 16px rgba(196, 120, 50, 0.28), 0 1px 0 rgba(255, 220, 170, 0.25) inset;
}
button:active { transform: translateY(1px); }
button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  filter: none;
  transform: none;
  box-shadow: none;
}
button.danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
  font-weight: 600;
  box-shadow: none;
}

.site-attr {
  max-width: 1100px;
  margin: 1.25rem auto 2rem;
  padding: 0 1rem 1.5rem;
  color: var(--silk-dim);
  font-size: 0.72rem;
  line-height: 1.5;
}
.site-attr a {
  color: var(--hasl);
  text-underline-offset: 2px;
}
.site-attr code {
  font-family: var(--mono);
  font-size: 0.68rem;
}

@media (max-width: 1100px) {
  .donor-layout { grid-template-columns: 1fr; }
}
@media (max-width: 960px) {
  .gene-tools { grid-template-columns: 1fr; }
}
@media (max-width: 840px) {
  .unit-head { flex-direction: column; align-items: flex-start; }
  .unit-head .hint { text-align: left; }
}